<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>盒子模型</title>
    <style>
        .box1{
            width: 350px;
            height: 600px;
            background-color: pink;
            background-image: url(../images/932F00FADC70F004CD85EE91CBA11443.jpg);
            background-repeat: no-repeat;
            background-size: cover;
        }
        .box2{
            width: 600px;
            height: 900px;
            background-color: #438eff;
            background-image: url(../images/014DD8BFF2B16B60C9F1F1671979032B.jpg);
            background-repeat: no-repeat;
            background-size: cover;
        }
        .box3{
            width: 600px;
            height: 900px;
            background-color: #52cbff;
            background-image: url(../images/c8fd97a40bf79f03e7b76cbc87236f612caef7b2.png);
            background-repeat: no-repeat;
           background-position: 50% 50%;
        }
    </style>
</head>
<body>
    <div class="box1">盒子模型</div>
    <div class="box3">盒子模型</div>
    <div class="box2">盒子模型</div>
</body>
</html>